ecuatii.cpp: In function `void eric(char*, float&, float&)': ecuatii.cpp:25: warning: assignment to non-pointer type `char' from NULL ecuatii.cpp:25: warning: argument to non-pointer type `char' from NULL ecuatii.cpp:10: warning: unused variable `int n' ecuatii.cpp:10: warning: unused variable `int i' ecuatii.cpp: In function `int main()': ecuatii.cpp:57: warning: char format, different type arg (arg 2)